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Consider the curve given parametrically by r(t) = (4 cost + 3 sint, 5 - 3 cost + 4 sint, 5t). (a) Reparametrize the

Consider the curve given parametrically by r(t) = (4 cost + 3 sint, 5 - 3 cost + 4 sint, 5t). (a) Reparametrize the curve with respect to arc-length starting from t = 0. (b) Find the unit tangent vector T(s). (c) Find the curvature k(s).

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